"stuart noble" wrote in message
...


IIRC the face of mdf is not at all porous. The edges are though.


That's quite a definitive statement. Not at all porous would mean that it
didn't soak water at all, glass is not porous. MDF is most definitely
porous, though maybe not as much on the face as it is on the edge as the
face is tighter packed. Try leaving a puddle of water on the face of a piece
of MDF ............ and watch it bloom.